diff --git a/Makefile b/Makefile
index 34f90bbe40a39c975bf34818b938c9d7f81066f7..5ecf6c0b12b43475934fe7a65ad069a32797b907 100644
--- a/Makefile
+++ b/Makefile
@@ -50,7 +50,7 @@ LDXX ?= g++
 OCAMLC := ocamlc.opt
 OCAMLCFLAGS := -g -I `ocamlfind query ocamlgraph`
 OCAMLOPT := ocamlopt.opt
-OCAMLOPTFLAGS := -g -cc $(LDXX) -unsafe -inline 100 -I `ocamlfind query ocamlgraph`
+OCAMLOPTFLAGS := -g -cc $(LDXX) -cclib -static -unsafe -inline 100 -I `ocamlfind query ocamlgraph`
 
 # No more user input beyond this point.